JPH03203598A - Drive circuit of stepping motor for paper feeder of printer device - Google Patents

Abstract

PURPOSE:To perform optimum control according to the load fluctuation of option by selecting a motor accelerating or decelerating speed profile from a ROM according to the sort of the option mounted on a printer device, and by using the speed profile. CONSTITUTION:The input of an option mounted on a printer device, to a microprocessor 1 from an option detection circuit 2 is provided, and according to its information, a speed profile housing ROM 3 is accessed, and a speed profile according to a pertinent option is obtained. Then, the data of the speed profile, namely, pulse timing, pulse interval, and driving pulse width are set at a timer 4, and change-over signal is fed to a distribution and excitation circuit 6.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a driving device for a stepping motor for paper feeding in a printer device, and particularly to a driving device for a stepping motor for paper feeding in a printer device, and particularly for a paper feeding device in a printer device in which a plurality of types of additional paper feeding devices are replaced and installed. The present invention relates to a driving device for a stepping motor.

[Conventional technology]

The drive device of the paper feeding stepping motor of a conventional printer device has a speed of acceleration/deceleration operation, regardless of the presence or absence or type of an additional paper feeding device (forms handling option: hereinafter simply referred to as option) installed in the printer device. The profile is constant, and it is determined to match the corresponding speed profile when the moment of inertia and frictional load of the entire mechanism including options are at their maximum.

[Problem to be solved by the invention]

As mentioned above, the drive device for the paper feeding stepping motor of conventional printers is configured to perform acceleration/deceleration operations according to a constant speed profile regardless of load fluctuations, so there is no option to set the maximum load in advance. We have calculated the moment of inertia and measured the frictional load when the vehicle is mounted, and determined the speed profile based on these calculations. Therefore, if there is no option or if a different type of option is installed, sudden angular displacement will occur due to the generation of motor output torque that exceeds the required amount, resulting in vibrations and vibrations due to overshoot and undershoot in transient conditions. It has the disadvantage of generating noise.

The object of the present invention is to improve the drawbacks of the drive device for the paper feeding step/sopping motor of the conventional printer device, and to
To provide a driving device for a stepping motor for feeding paper in a printer device, which can realize smooth movement with the least vibration in response to load fluctuations when several types of options are installed.

[Means to solve the problem]

The driving unit X of the paper feeding stepping motor of the printer device of the present invention includes a read-only memory storing speed profile data corresponding to the type of additional paper feeding device installed in the printer device, and a read-only memory that stores speed profile data corresponding to the type of additional device for paper feeding installed in the printer device. a detection circuit that detects the paper feeding additional device and sends an identification signal; and a detection circuit that inputs the identification signal from the detection circuit and reads out the speed profile data corresponding to the identification signal from the read-only memory. The printer is equipped with a microprocessor that controls the operation of the paper feeding stepping motor.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

As shown in FIG. 1, the microprocessor 1 inputs whether or not the printer device is equipped with an option and, if so, the type thereof, as option identification signals 11 and 12 from the option detection circuit 2. Then, the speed profile storage ROM 3 is accessed based on the information to obtain the speed profile corresponding to the corresponding option.

The microprocessor 1 sets the speed profile, that is, the pulse timing, pulse interval, and drive pulse width data in the timer 4, and sends a switching signal to the distribution excitation circuit 6.

By such control operation of the microprocessor 1,
As shown in FIG. 2, when a certain type of option is installed in the printer device, the motor drive pulse 13 is sent from the timer 4 to the common driver 5 with a speed profile commensurate with the load of the installed option. , a common current 14 flows through the stepping motor 7. This common current 14 is set to a value necessary to generate a motor torque commensurate with the load in accordance with the acceleration of the rotation of the stepping motor. The speed characteristics are as shown in (b), and smooth rotational motion is achieved without vibration.

〔Effect of the invention〕

As described above, the drive device for the paper feeding stepping motor of the printer device of the present invention detects the type of option installed in the printer device, and creates a speed profile for motor adjustment/subtraction operation corresponding to the detected type of option. is selected from the ROM, and the paper feeding stepping motor is programmed with a microprocessor to follow that speed profile.
By driving the paper by controlling the feeder, it is possible to achieve smooth rotation with little vibration, and therefore, it is possible to control the paper feeding operation optimally according to load fluctuations of installed options.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
1A and 2B are waveform diagrams and characteristic diagrams of a paper feed stepping motor showing operation timings when an option is added to the printer device in the embodiment of FIG. 1; 1... Microprocessor, 2... Option detection circuit, 3... Speed profile storage ROM (ROM>
, 4...Timer, 5...Common driver, 6...
Distribution excitation circuit, 7...Stesoping motor, 2...Option identification signal, 3...Motor drive pulse, 4...Common current.

Claims (1)

[Claims] A read-only memory storing speed profile data corresponding to the type of additional paper supply device mounted on the printer device, and detecting the additional paper supply device mounted on the printer device and transmitting an identification signal. a detection circuit; and a microprocessor that inputs the identification signal from the detection circuit, reads out the speed profile data corresponding to the identification signal from the read-only memory, and thereby controls the operation of the paper feeding stepping motor. A driving device for a stepping motor for paper feeding in a printer device, characterized in that: